This might be more suitable for the Bokeh discourse, but I’m trying to set up a way of exporting a Bokeh figure to svg through panel. While the figure exports ok, I’m seeing a bunch of browser errors and file missing errors when it gets triggered. The file missing errors seem to all be Panel related.
This is a minimal reproducible example (running on Panel 1.2.3 and Bokeh 3.2.2 – when I try to upgrade I’m having unrelated selenium problems)
import panel as pn
import pandas as pd
from bokeh.models import ColumnDataSource
from bokeh.transform import linear_cmap
from bokeh.plotting import figure
from bokeh.io import export_svg
import bokeh.palettes
import param
pn.config.notifications = True
pn.extension('tabulator', 'jsoneditor')
dict = {
'col_no' : [1, 2, 3, 1, 2, 3, 1, 2, 3],
'row_no' : [1, 1, 1, 2, 2, 2, 3, 3, 3],
'value' : [1, 2, 3, 4, 5, 6, 7, 8, 9]}
data = pd.DataFrame(dict)
class test_app(param.Parameterized):
heatmap_ready = param.Boolean()
heatmap_go = param.Action(lambda x: x.param.trigger('heatmap_go'))
download_go = param.Action(lambda x: x.param.trigger('download_go'))
param_dict = param.Dict(dict)
@param.depends('heatmap_go', watch = True)
def set_ready(self):
self.heatmap_ready = True
@param.depends('heatmap_go')
def show_heatmap(self):
if self.heatmap_ready:
#return 'ready'
p = figure(
active_drag = None,
y_axis_location = 'right',
x_axis_location='above',
frame_width = 75 * len(data.col_no.unique()),
frame_height = 75 * len(data.row_no.unique()))
#p.output_backend = 'svg'
p.rect(x="col_no",
y="row_no",
width=1,
height=1,
source=ColumnDataSource(self.param_dict),
fill_color = linear_cmap(
palette='Viridis256',
field_name = 'value',
low = 1,
high = max(self.param_dict['value'])),
line_color='white',
line_width=1)
return pn.pane.Bokeh(p)
else:
return 'not ready'
@param.depends('download_go', watch = True)
def download_heatmap(self):
if not self.heatmap_ready:
pn.state.notifications.warning('not ready!')
else:
p = figure(
active_drag = None,
y_axis_location = 'right',
x_axis_location='above',
frame_width = 75 * len(data.col_no.unique()),
frame_height = 75 * len(data.row_no.unique()))
#p.output_backend = 'svg'
p.rect(x="col_no",
y="row_no",
width=1,
height=1,
source=ColumnDataSource(self.param_dict),
fill_color = linear_cmap(
palette='Viridis256',
field_name = 'value',
low = 1,
high = 9),
line_color='white',
line_width=1)
export_svg(p, filename = 'minimum.svg')
pn.state.notifications.success('woohoo!')
def view(self):
return pn.template.VanillaTemplate(
title = 'test',
main = pn.Row(
self.show_heatmap,
#pn.Column(
pn.widgets.Button.from_param(
self.param['heatmap_go'],
button_type = 'primary',
width = 80),
pn.widgets.Button.from_param(
self.param['download_go'],
name = 'Download',
button_type = 'primary',
width = 80),
pn.widgets.JSONEditor.from_param(
self.param['param_dict'],
name = 'Values',
width = 300)),
logo = 'htviz/imgs/icon.png'
).servable()
test_app().view()
The python console errors I see are:
